Circulatory System

Question 1

Circulatory system role

Answer 1

• deliver nutrients and oxygen to cells
• remove carbon dioxide from cells
• remove waste to where it can be disposed of
• distribute heat around the body

Question 2

Define heart

Answer 2

One of the mist vital organs of the human body it is the pump that pushes blood through the body

Question 3

Direct of blood flow

Answer 3

Vena cava-> right atrium-> right ventricle-> pulmonary arteries-> lungs-> pulmonary veins-> left atrium-> left ventricle-> aorta (to body)

Question 4

Deoxygenated blood

Answer 4

Blood flowing in right side of heart is deoxygenated (blue)

Question 5

Oxygenated blood

Answer 5

Blood flowing in the left side of the heart is oxygenated (red)

Question 6

3 main types of blood vessels

Answer 6

Arteries
Capillaries
Viens

Question 7

Arteries function

Answer 7

Carry blood away from heart

Have thick strong walls to maintain high pressure

Question 8

Capillaries function

Answer 8

Very small diameter blood vessels with thin walls
Oxygen and nutrients are transferred into cells
Carbon dioxide and waste are transferred out of cells

Question 9

Veins function

Answer 9

Carry blood towards heart
Have some values so that blood flows in one direction
Thin walls

Question 10

What blood carries

Answer 10

Nutrients
Oxygen
Carbon dioxide
Wastes

Question 11

blood components

Answer 11

Red blood cells=45%
Carry oxygen and carbon dioxide
Doughnut like shape to squeeze through small capillaries

Question 12

Blood components

Answer 12

White blood cell= 0.1%
Attack disease and infection
Bind to breakdown foreign substances killing them

Question 13

Blood components

Answer 13

Platelets= 0.01%
Stop bleeding
At a cut, they band together with fibrinogen and seal the hole

Question 14

Blood component

Answer 14

Plasma= 55%

Liquid in which all the cells, nutrients and wastes are bathed

Question 15

Define bruises

Answer 15

Occurs when blood vessels are ruptured and blood leaks into the surrounding tissue